I do Internet research for the American International School of Kingston (Jamaica) which is a K-12 institution, where I research the Internet for materials for use by teachers. An ESL teacher has asked me to source text series with accompanying audio components, running from beginner to advanced levels. I would greatly appreciate any advice on where I can find any.

For something very different take a look at www.elliesenglish.com - the idea is to provide entertaining text and audio for intermediate level upwards. The material is intended to complement formal grammar training. The site has just started (officially from Monday 14 August) and (based on feedback) will be developed extensively over the next year.